Python Foundation with Data Structures & Algorithms - Part 01

Introduction to Python Programming Language

What is Python?

Python is a popular programming language. It was created by Guido van Rossum, and released in 1991.

It is used for:

artificial intelligence
big data
web development (server-side)
software development
mathematics
system scripting

First Python Program

 print("www.machinelearning.org.in")

www.machinelearning.org.in

 print("Python")
 print("Data Science")
 print("Machine Learning")

Python
Data Science
Machine Learning

Single Line Comment

Comments start with a #, and Python will render the rest of the line as a comment:

 'print("Hello")  #This is a comment'

Hello

 'print("Python")
 print("Data Science")
 #print("Machine Learning")
 print("Deep Learnig")
 print("Artificial Intelligence")'

Python
Data Science
Deep Learnig
Artificial Intelligence

Multiline Comment

Python will ignore string literals that are not assigned to a variable, you can add a multiline string (triple quotes) in your code, and place your comment inside it:

 '''
 print("Python")
 print("Data Science")
 print("Machine Learning")
 print("Deep Learning")
 '''
 print("Artificial Intelligence")

Artificial Intelligence

Assign Value to a variable

 a=10
 b=3.134
 c="Machine Learning"
 print(a)
 print(b)
 print(c)

10
3.134
Machine Learning

 print("Value of a :",a)
 print("Value of b :",b)
 print("Value of c :",c)

Value of a : 10
Value of b : 3.134
Value of c : Machine Learning

 print(a,b,c)

3.134 Machine Learning

 print("Value of a :",a,"Value of b :",b,"Value of c :",c)

Value of a : 10 Value of b : 3.134 Value of c : Machine
Learning

 print("Value of a :",a,"\nValue of b :",b,"\nValue of c 
:",c)

Value of a : 10
Value of b : 3.134
Value of c : Machine Learning

 print("Value of a :",a,end='\n')
 ("Value of b :",b,end='\n')
 print("Value of c :",c,end='\n')

Value of a : 10
Value of b : 3.134
Value of c : Machine Learning

 print("Value of a :",a,end=' ')
 print("Value of b :",b,end=' ')
 print("Value of c :",c,end=' ')

Value of a : 10 Value of b : 3.134 Value of c : Machine
Learning

Accepting User Inputs

input( ) accepts input and stores it as a string. Hence, if the user inputs a integer, the code should convert the string to an integer and then proceed.

 a=input("Enter any value:")
 print(a)

Enter any value:Machine Learning
Machine Learning

 print(type(a))

< class 'str' >

Note that type( ) returns the format or the type of a variable or a number